Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
thuc gia » thuc giai, thue gia, thuc dia
so sach » so sanh, bo sach, co sach
sach ly » sach y, sach lo, sach ty
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ly ((nang xa) OR (lang xa)) hoi. hieu ((va cach) or (va cac)) thuc gia thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ly ((nang xa) OR (lang xa)) hoi. hieu ((va cach) OR (va cac)) thuc gia thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ly ((nang xa) OR (lang xa)) hoi. hieu ((va cach) or (va cac)) thuc gia thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach ly ((nang xa) OR (lang xa)) hoi. hieu ((va cach) or (va cac)) thuc gia thanh vi cua tre*.